.wrap {
    font-family: Tahoma, Arial, Roboto, "”Droid Sans”", "”Helvetica Neue”", "”Droid Sans Fallback”", "”Heiti SC”", sans-self;
    background: url(../img/banner.jpg) no-repeat;
    background-position: center;
    background-size: cover;
    background-attachment: fixed;
}

.header {
    background-color: rgba(0, 0, 0, 0.4);
}

.header nav {
    height: 50px;
    background-color: #ccc;
    line-height: 50px;
}

.header nav ul li {
    float: right;
    margin-right: 30px;
}

.header nav ul li:nth-child(1) {
    float: left;
    margin-left: 40px;
}

.header nav ul li:nth-child(1) a {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 2px;
}


/* banner部分开始 */

.banner {
    padding-top: 160px;
}

.banner .inner {
    margin: 0 auto;
    text-align: center;
    color: #fff;
    width: 300px;
}

.line {
    width: 65%;
    background-color: #fff;
    height: 2px;
    margin: 0 auto;
    margin-bottom: 10px;
}

.inner h1 {
    margin-bottom: 10px;
}

.inner p {
    line-height: 30px;
    font-size: 18px;
    letter-spacing: 1px;
}

.inner button {
    margin-top: 20px;
    padding: 10px 20px;
    border-radius: 5px;
    background-color: #e85e17;
    color: #fff;
    cursor: pointer;
}

.inner button:hover {
    transform: rotate(1080deg) scale(2);
    transition: transform 2s;
}

.inner .more {
    margin-top: 140px;
    padding-bottom: 10px;
}


/* banner部分结束.banner .inner  */


/* 内容区开始 */

.content {
    opacity: 0.9;
}

.part_one {
    text-align: center;
    color: #fff;
    background: rgba(67, 178, 165, 1);
    padding-top: 65px;
    opacity: 0.95;
}

.part_one .wrapper {
    margin: 0 auto;
}

.part_one .wrapper h1 {
    padding: 15px 0;
    font-size: 27px;
}

.part_one .wrapper .line {
    margin: 15px auto;
    width: 40%;
    background-color: darkgray;
}

.part_one .wrapper p {
    padding: 15px 0;
    font-size: 18px;
    letter-spacing: 1px;
}

.icon {
    margin-top: 30px;
    padding-bottom: 30px;
}

.icon .item {
    display: inline-block;
    border: 2px solid darkgreen;
    width: 80px;
    height: 80px;
    margin-right: 50px;
    transform: rotate(45deg);
}

.icon .item img {
    width: 100%;
    transform: rotate(-45deg);
}


/* .part_two开始 */

.part_two {
    background-color: rgb(33, 44, 50);
    /* opacity: 0.85; */
}

.frist {
    overflow: hidden;
}

.frist div {
    float: left;
}

.frist_left {
    width: 45%;
    box-sizing: border-box;
}

.frist_left img {
    width: 100%;
}

.frist .frist_text {
    position: relative;
    top: 68px;
    left: 50px;
    width: 55%;
    color: #fff;
    box-sizing: border-box;
}

.frist .frist_text h2 {
    font-size: 24px;
    margin-bottom: 12px;
}

.frist .frist_text h3 {
    font-size: 20px;
    margin-bottom: 20px;
}

.frist .frist_text p {
    font-size: 18px;
    width: 80%;
}

.part_two .frist:nth-child(odd) {
    background: rgba(255, 255, 255, 0.05);
}


/* odd 奇数行 */


/* .part_two结束 */


/* part_three开始 */

.part_three {
    background-color: #3f3965;
    opacity: 0.9;
    color: #fff;
    margin: 0 auto;
}

.part_three .three_text {
    margin: 0 auto;
    width: 60%;
    padding-top: 80px;
}

.part_three .three_text h2 {
    margin-bottom: 30px;
    text-align: center;
}

.part_three .three_text .line {
    background-color: #1a0973;
    width: 55%;
    margin-bottom: 20px;
}

.card_group {
    margin: 0 auto;
    width: 60%;
    margin-top: 20px;
}

.card_group .card {
    min-height: 300px;
    width: 50%;
    padding: 50px;
    float: left;
    max-width: 461px;
    box-sizing: border-box;
}

.card_group .card h2 {
    text-align: center;
    padding: 20px 0;
}

.card p {
    font-size: 18px;
}

.card:nth-child(1) {
    background: rgba(0, 0, 0, 0.05);
}

.card:nth-child(2) {
    background: rgba(0, 0, 0, 0.08);
}

.card:nth-child(3) {
    background: rgba(0, 0, 0, 0.15);
}

.card:nth-child(4) {
    background: rgba(0, 0, 0, 0.2);
}

.card:nth-child(5) {
    background: rgba(0, 0, 0, 0.22);
}

.card:nth-child(6) {
    background: rgba(0, 0, 0, 0.25);
}


/* part_three结束 */


/* 内容区结束 */

footer {
    background-color: #333;
    min-height: 200px;
    text-align: center;
    color: #fff;
}

footer .share_group {
    margin: 0 auto;
    padding: 45px;
    font-size: 0;
}

footer .share_group li {
    display: inline-block;
    font-size: 18px;
    margin-right: 15px;
}


/* 遮罩 */

.mask {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.3);
    display: none;
}


/* 小白条开始 */

.active {
    position: relative;
}

.active span {
    position: absolute;
    width: 100%;
    height: 4px;
    background-color: #fff;
    bottom: 5px;
    left: 0;
}

.slider {
    background-color: #333;
    position: fixed;
    top: 0;
    right: -300px;
    bottom: 0;
    width: 300px;
    box-sizing: border-box;
    transition: 1s;
}

.slider ul li {
    padding: 20px 30px 20px;
    font-size: 18px;
}

.slider ul li:nth-child(1) {
    margin-top: 30px;
}

.slider ul li:hover {
    padding: 20px 30px 20px;
    font-size: 18px;
    background-color: #666;
}

.slider li a {
    color: #fff;
}


/* 小火箭 */

.top {
    width: 60px;
    height: 30px;
    position: fixed;
    right: 50px;
    bottom: 100px;
    text-align: center;
    cursor: pointer;
}

.top img {
    width: 100%;
    margin-bottom: 5px;
}

.top span {
    font-size: 20px;
    color: #ccc;
    letter-spacing: 2px;
}

.top span:hover {
    color: #e85e17;
}